Why Ag Stocks Have Room to Run

"We are back in raging bull territory," Cramer said Thursday. "More than anything else, that means you have to forget about where stocks have come from and only focus on where they're going to."

Take agriculture, for example. Deere , which makes farming equipment, recently saw shares hit a new 52-week high. The stock is up nearly 40 percent from where Cramer recommended it at $64 on July 28. Cramer got behind Potash at $114 on Aug. 5 and since then, the stock has climbed by nearly 50 percent. Shares of Mosaic , a fertilizer maker, also hit a 52-week high.

It never hurts to take some profits, but Cramer thinks these stocks have more room to the upside. Don't be afraid to let your winning stocks run. It may be a difficult concept to swallow, especially since stocks have taken a beating over the past decade, so Cramer went "Off the Charts" to show you the move in agriculture may have just begun. Watch the video to see his full report.